Article Per Year (5 Year)
p-Index From 2020 - 2025
2.504
P-Index
This Author published in this journals
All Journal International Journal of Science and Engineering (IJSE) BERKALA FISIKA SAINS DAN MATEMATIKA Jurnal Ilmiah Aplikasi Isotop Radiasi YOUNGSTER PHYSICS JOURNAL Jurnal Riset Industri Hasil Hutan Journal of Physics and Its Applications JURNAL MAHASISWA BK AN-NUR : BERBEDA, BERMAKNA, MULIA Jurnal Ilmiah Padma Sri Kreshna Jurnal Abdimas Bina Bangsa Jurnal Ilmiah Agroust
Evi Setiawati
Departemen Fisika, Fakultas Sains Dan Matematika, Universitas Diponegoro, Semarang
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

Published : 49 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 49 Documents
Search

 1   2   3   4   5 
EVALUASI METODE PENENTUAN HALF VALUE LAYER (HVL) MENGGUNAKAN MULTI PURPOSE DETECTOR (MPD) BARRACUDA PADA PESAWAT SINAR-X MOBILE Handini Devi Yunitasari; Evi Setiawati; Choirul Anam
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (547.561 KB)

Abstract

The dose received by the patient and the radiographic image quality is determined by the value of the half value layer (HVL). Multi Purpose Detector (MPD) Barracuda, produced by RTI Electronics, Sweden, is a solid state detector that can be used to measure the value of HVL just one exposure. This study was conducted to evaluate the accuracy of measurement of the HVL’s value with single exposure methods using the MPD Barracuda. In this study the value of HVL measurements performed with distance of focus to detector 100 cm, field size of 10x10 cm2 and times- current 12.5 at a voltage of 50 kVp, 60 kVp, 70 kVp, 81 kVp and 90 kVp.  HVL measurement for single exposure method  conducted without the addition of Al filter. As for comparative used standard methods that use some thickness variation of filters from 0.5 to 5.0 mmAl. In the standard method, determination of HVL values calculated in two ways: interpolation formula and method of graphs. The results showed that the value of HVL using MPD Barracuda with single exposure method produces a lower value than the standard method used multiple filters and HVL calculated by interpolation and graphics.Keywords: Half Value Layer (HVL), Multi Purpose Detector (MPD) Barracuda, X-ray.
ANALISIS PENGGUNAAN POLYDIMETHYL SILOXANE SEBAGAI BOLUS DALAM RADIOTERAPI MENGGUNAKAN ELEKTRON 8 MeV PADA LINAC Dodi Junaedi; Evi Setiawati; Zaenal Arifin; Sanggam Ramantisa
Youngster Physics Journal Vol 5, No 4 (2016): Youngster Physics Journal Oktober 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (399.599 KB)

Abstract

Percentage depth dose at the Linac has not reached 100% on the surface and should be made an effort to treat skin cancer or skin cancer that is closer to the surface so that the maximum dose obtained cancer, one of the efforts is the use of bolus. The research reviewer feasibility of using polydimethylsiloxane as materials bolus in radiotherapy. Bolus made with a thickness of 3, 6, 9 and 12 mm with a size of 11x11 cm2, tomography image is then taken using a CT-scan to determine the CT-number that is used to calculate the density and compared to the density of mass and volume ratio. Bolus irradiated with electron 8 MeV at 100 MU for 60 seconds and measured the dose absorbed at a depth of 0; 0.5; 1.0; 1.5; 2.0 and 2.5 cm. The result of the calculation using the CT-number density is 1.24 ± 0.02 g /cm3 and the density calculation results using the ratio of the mass and volume was 1.25 ± 0.01 g / cm. Absorbed dose at the surface with the use of a bolus of 3, 6, 9 and 12 mm by 82.09%; 85.13%, 89.12% and 93.48%, while without using bolus which showed the value of absorbed dose amounted to 78.23%. Absorbed dose at a depth of 2.5 cm with the use of a bolus of 3, 6, 9 and 12 mm by 79.84%; 49.26%; 34.52% and 17.80%, while without using bolus which showed the value of absorbed dose amounted to 88.68%.These results show the density of the bolus polydimethyl siloxane has similarities with soft tissue density and may increase the dose of the surface and reduce the dose depth so polydimethyl siloxane may be one of the reference materials that can be used as a bolus in radiotherapy.
ANALISIS PERHITUNGAN DOSIS SERAP TERAPI ROTASI DENGAN METODE TISSUE PHANTOM RATIO (TPR) PADA LINEAR ACCELERATOR (LINAC) 6 MV Ifa Istighfaroh; Evi Setiawati; Zaenal Arifin; Sanggam Ramantisan
Youngster Physics Journal Vol 5, No 4 (2016): Youngster Physics Journal Oktober 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (388.552 KB)

Abstract

This Research has been conducted for the absorbed dose calculation in rotational treatment with Tissue Phantom Ratio (TPR) method. The purpose of this study to determine the absorbed dose comparisons on rotational therapy based on calculations and measurements. The study was conducted in a solid water phantom with 100 cm SAD. The study was conducted on a square field area of 5 cm x 5 cm, 7 cm x 7 cm and 10 cm x 10 cm as well as on equivalent field area of 10 cm x 10 cm, consist of 8 cm x 13,3 cm and 9 cm x 11,5 cm area. The result is percentage of difference between the value of measurements and calculations dose on each field area. The field area which have percentage below the tolerance value is a 7 cm x 7 cm with the percentage of difference of 0.46%. For the field area of 5 cm x 5 cm has a percentage of difference of 2.65%, while the area of 10 cm x 10 cm and equivalent field area the percentage of difference were high at more than 3%.
Analisis kurva isodosis paparan radiasi pada ruang terapi dengan Linear Accelerator (LINAC) 6MV Ana Aprilia; Eko Hidayanto; Evi Setiawati; Sanggam Ramantisan
Youngster Physics Journal Vol 7, No 1 (2018): Youngster Physics Journal Januari 2018
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (681.685 KB)

Abstract

Radiation exposure in the therapy room with linac 6 MV devices has been conducted at Ken Saras hospital. The purpose of this research was to determine the radiation exposure in the therapy room to provide the information for radiation workers regarding the safe location in therapy room using isodose curve presentation and contour mapping of radiation exposure in the therapy room. The results of radiation exposure measurement were then used to calculate the radiation dose received by patients during therapy as patient information. The method used in this research was the direct measurement of radiation exposure in therapy room using survey meter with 130 cm height from the floor at some point with the addition of each 1 meter, field size is 40 cm x 40 cm, absorbed dose is 50 MU and variations of the gantry position, gantry 00, gantry 900 and gantry 2700.  The result of the measurement then used to create a contour using a software and then analysed to point the safe location through a mathematical calculation. The Values of radiation exposure in field size of 40 cm x 40 cm then converted to the value of radiation exposure in field size of 10 cm x 10 cm on a sample study case patient X by multiplying with the value of the inverse square. The converted value is then calculated into the radiation dose received by patients X during therapy. The results showed that the gantry 00 and gantry 2700 position, the safe location in therapy room for radiation worker is at the position (-5.5; -4) with a dose rate of 7.2 μSv / h and 9.6 μSv /h while at gantry 900  position  there is no safe area for radiation workers in the therapy room. The value of exposure radiation that received by the patient X in this research, that undergo once therapy with 4 times exposure at 4 variation gantry position at dose of 50 MU with  10 cm x 10 cm field size is 1196.9502 μSv or 1.197 mSv. Keywords:  radiation exposure, therapy rooms, isodose curve, safe area, patient radiation dose
PENENTUAN NILAI TEBAL PARUH (HVL) PADA CITRA DIGITAL COMPUTED RADIOGRAPHY Cicilia Artitin; Suryono Suryono; Evi Setiawati
Youngster Physics Journal Vol 4, No 1 (2015): Youngster Physics Journal Januari 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (439.696 KB)

Abstract

Half value layer (HVL) can be determined by using the method of digital image processing. This research is done by using stepwedge as an object. The stepwedge exposed a tube voltage of 80 kV and 10 mAs, 20 mAs, 30 mAs, 40 mAs, and 50 mAs. After getting the next image is processed in Matlab to find the value of gray level and HVL value . HVL values generated in this study was 3.08 mmAl, mmAl 3.60, 5,67mmAl, mmAl 7,27, and 8,41 mmAl. HVL value is still allowed under the Indonesian republic health minister's decision no. 1250, 2009, requirements on the voltage value of 80 kV HVL better when ≥ 2.3 mmAl. The value for examination was stated in Regulation No. Head BAPETEN 9 of 2011 so that the X-ray plane fit for use . Keywords: Half Value Layer (HVL), Stepwedge, Grey Level, Digital Image
DETEKSI THORIUM PADA KAOS LAMPU PETROMAKS MENGGUNAKAN SPEKTROMETER BETA DENGAN DETEKTOR SINTILASI DARI BAHAN ORGANIK NAFTALEN Nina GInanto Putri; Evi Setiawati
Youngster Physics Journal Vol 4, No 4 (2015): Youngster Physics Journal Oktober 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (534.854 KB)

Abstract

The radioactivity of Thorium contained in gas mantles has been successfully detected. Thorium is the source of radiation that it emits the types of alpha (α) and beta (β) radiation, so it can be said to have radiation with little activity. In this study, the detection of radioactivity of Thorium using a scintillation detector with an organic material of Naphthalene scintillator which has a efficiency value of 53.42%. In addition, the composition of the materials was characterized by Energy Dispersive X-ray spectroscopy (EDX). Gas mantles mounted on petromaks lights and it turned on. The result of combustion of powders was pressurized, so that it became a solid sample. The variations of  sample were A and B, while there were 9 variations of Naphthalene scintillator thickness of 0.5 mm intervals in the range 1-5 mm. The A sample result of EDX characterization show that the composition of the constituent material C, Mg, Cu, and Th. The composition of the material making up the B sample  was  B, O, Y, Pt, Pb, and Th. Thorium activity was determined by counting the samples for 10 seconds each variation of the thickness of the scintillator. The radiation activities of Thorium were found in A and B samples respectively, 8.419 and 8.692 nCi.Keywords: Plasma jet, characterization of  plasma jet,  flow rate of Argon gas, voltage, current
ANALISIS PENERIMAAN DOSIS RADIASI DI ORGAN MATA PADA PEMERIKSAAN NASOFARING MENGGUNAKAN CT SCAN Masdi Masdi; Evi Setiawati; Choirul Anam
Youngster Physics Journal Vol 2, No 4 (2013): Youngster Physics Journal Oktober 2013
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (225.783 KB)

Abstract

ABSTRACTThe examination of nasopharynx CT Scan for the diagnosis tumors, was performed by two phase, plain phase and contrast medium phase, so will result in a very high radiation dose to the organs in the head especially the eyes. This study aimed to obtain the value of the radiation dose was received organ in the eye in patient who underwent nasopharynx CT Scan.  The study was begun by measuring the consistency of the output X-ray tube voltage (kVp Output). Furthermore, measurement of the radiation dose to the organ eye using TLD-100 chips were placed on the surface of the eye organ of the 22 different patients with sequences and spiral scan mode, and using the slice number between 24 to 39. Measurement technique was done by using a tube voltage and tube current time fixed at 130 kVp, 250 mAs, slice thickness and slice collimation of 4 mm and 6x2 mm.The result on the eye organ doses of nasopharynx CT Scan two phase with sequence mode to obtain eye organ dose value between 83.291 mGy to 101.571 mGy, whereas the spiral mode to obtain eye organ dose values varied between 89.536 mGy to 109.359 mGy, showing that the value of the eye organ dose spiral modes greater than mode sequence. The results also showed that the value of the eye organ dose received about one fifth of the value of the damage threshold of the eye lens dose of 500 mGy. Key words: Eye dose, CT Scan, thermoluminisence dosimeter (TLD)
Analisis aktivitas radionuklida alam dan dosis paparan radiasi pada material bangunan Riana Anis Safitri; Evi Setiawati; Gede Sutresna Wijaya
Youngster Physics Journal Vol 6, No 1 (2017): Youngster Physics Journal Januari 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (736.881 KB)

Abstract

Building materials cement, gipsum and sand were analized quantitatively and qualitatively for the natural radionuclides using gamma spectroscopy method with detector high purity germanium (HPGe). The highest value observed in the activity concentration of 226Ra, 232Th and 40K were found in sand that 42,12 Bq kg-1, 27,79 Bq kg-1and 316,20 Bq kg-1. The highest value of radium equivalent (Raeq) 106,21 Bq kg-1 was found in sand are bellow the internationally accepted values (370 Bq kg-1). The highest value of internal and external hazard indices were found in sand 0,401 dan 0,287 are less than unity (Hin≤1 and Hex≤1). The highest value of absorbed dose rate was found in sand 49,52 nGy h-1 are lower than the world population-weight average of 84 nGy h-1. The highest annual effective dose values was found in sand 0,243 mSv y-1 is lower than the limit of accepted value 1 mSv y-1. The study shows that measured radioactivity for bulding materials cement, gipsum and sand does not pose as significant source radiological hazard and is save for use in construction of building or dwelling.Keywords: Nature radionuclide, Radiation dose, Gamma spectrometry 
ANALISA CTDI PADA PERMUKAAN DAN PUSAT PHANTOM MENGGUNAKAN CT DOSE PROFILER Cory Amelia; Evi Setiawati; Zaenal Arifin
Youngster Physics Journal Vol 3, No 4 (2014): Youngster Physics Journal Oktober 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1233.547 KB)

Abstract

The research has been done on the comparative value of CTDI on the surface and the center of the phantom. This research was conducted to determine the value of CTDI on the top surface, center, and bottom of the phantom using the CT Dose Profiler on CT scan head and determine the effect of tube voltage on the value of CTDI. The research was conducted with take a CTDI data using the CT Dose Profiler on spiral CT scan mode and using a phantom head. Measurements a CTDI conducted on the top surface, center and bottom surface of the phantom with the variation of the tube voltage value is 80 kV, 100 kV, and 120 kV, and current value 320 mA, time 18.5 s, pitch 0,531, slice thickness 5 mm, and scan length 180 mm. The results of measurements the value of CTDI with variation a tube voltage on the top surface of the phantom was 22.75 mGy to 62.97 mGy, the center of phantom was 19.34 mGy to 59.66 mGy and the bottom surface of the phantom was 20.10 mGy to 54, 19 mGy.  Keywords: Head Phantom, the CT Dose Profiler, CTDI, Tube Voltage.
Pengukuran Tebal Kontaminasi Zat Radioaktif pada Permukaan Tanah Secara In Situ Menggunakan Spektrometer Gamma Portabel Wijianto Wijianto; Much. Azam; Evi Setiawati; Bunawas Bunawas
BERKALA FISIKA Vol 9, No 4 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (180.708 KB)

Abstract

Determination of contamination’s thickness on the ground for  homogeneous  source compound Cs -137 and Co-60 use portable gamma  spectrometry with height purity germanium detector ( HPGe detector) have been done.There are two methods to determine contamination’s thickness on the ground surface. The first method is Korun’s modification by looking for the total count of gamma ray before and already to experience attenuation for Cs-137 and Co-60 then divided by the decrease of linear attenuation coefficient Cs-137 and Co-60. The second is Xu comparison method by made variation of distance from ground surface to detector surface then compared with total count of gamma ray from one source Cs-137 or Co-60 during counting time. The results from experiment obtained for Korun’s modification for the actual thickness 10 cm, 20 cm and 24 cm have an error at 2 % , for actual thickness 12 and 16 cm,and an error at 3 %, for actual thickness 6 cm and 8 cm an error of 4 % and, for actual thickness 4 cm have an error at 9 %. Then for the Al Ghamdi  to Xu Comparison method,  for Co-60 in the actual thickness 6 cm and 10 cm have error 3 % and 12 %, and for Cs-137 in the  actual thickness 10 cm and 6 cm have error 9 % and 48 %.   Key words:  HPGe detector, portable gamma  spectrometry, contamination, Korun’s modification and Xu comparison method.
Co-Authors Agus Margiantoro Ahadiyah, Naeli Ni'matin Ana Aprilia Anak Agung Gede Sugianthara Ardiansyah, Mustofa Ariyanti Nur Anisa Asep Yoyo Wardaya Awwalin, Aufi Rizqiatul Binu Soesanto, Qidir Maulana Bunawas Bunawas Choirul Anam Choirul Anam AM Diponegoro Cicilia Artitin Cory Amelia Dessy Dian Monita Pardede Djoko Heru Pamungkas Dodi Junaedi Dortua Helena Sidabutar Eko Hidayanto Elvira Situmorang Erna Mariani Evi Handriani Bertua Simamora F Arianto Fajar Arianto Galih Puspa Saraswati Gede Sutresna Wijaya Gutji, Nelyahardi Hammam Oktajianto Hammam Oktajianto Handini Devi Yunitasari Harahap, Nur Hasanah Ifa Istighfaroh Indras Marhaendrajaya Intan Andriani Jatmiko Endro Suseno K Sofjan Firdausi K. Sofjan Firdausi Kusworo Adi Maria Theresia Darini Masdi Masdi Maulana, Alsa Putra Mochammad Facta Mohammad Afif Rachmatulloh Much. Azam Muchammad Azam, Muchammad Mursiyatun Mursiyatun Nanang Suriansyah Ngurah Ayu Ketut Umiati Nina GInanto Putri Nur Indah Lestari Nurul Laili Khoirut Tabi’atin Pandji Triadyaksa Poppy Intan Thahaja Rahmadi Setyawan Rahmaningtyas, Avivah Riana Anis Safitri Ridwan Eko Susanto Rinarto Subroto S Juliawan S. Suryono Sanggam Ramantisa Sanggam Ramantisan Sanggam Ramantisan Sari, Devi Artika Setiyono Setiyono Stefani, Eska Sudrajat, Ignasius Suprih Sumariyah M.Si Sumariyah Sumariyah Suroto Suroto Susilo Hadi, Susilo Suwardi Suwardi Syahria Syahria Trisna Budiwati Verry Richardina, Verry Very Richardina Very Richardina Wijianto Wijianto Windarta, Jaka Yunianta Yusup Hidayat Zaenal Arifin Zaenul Muhlisin Zainul Muhlisin